Technics SA-CH750 User Manual

2
“SA-CHT750 |
™@ GENERAL Dimension (WxHxD) 270119334 mm
Power consumption 175W Weight 5.5kg
Power supply
For (E), (EG) areas AC 50/60 Hz, 230 V Notes:
For (EB), (GN) areas AC 50/60 Hz, 230 V-240 V 1. Specifications are subject to change without notice.
For (GC) area AC 50/60 Hz, 110/127/220/240 V 2. Weight and dimensions are approximate.
3. Total harmonic distortion is measured by the digital spectrum
|
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NTE
NTS
analyzer.
Page Page
@BEFORE REPAIR weci5 Sa cds eee eee ts as bee SO 2 @SCHEMATIC DIAGRAM ............002 20 ce cee eee 14~22
e@PROTECTION CIRCUITRY .......... 2.00. e eee eee eee 2 ePRINTED CIRCUIT BOARD DIAGRAM................ 23~27
@ACCESSORIES............ 00. cece cece eee eee reer eeeee 2,3 e@WIRING CONNECTION DIAGRAM .............00000 eee 28
@LOCATION OF CONTROLS ..... 1. eee eee 3,4 @BLOCK DIAGRAM............. 0.00 c ccc een eee 29~31
e@STACKING THE COMPONENTS .............. 000 cece eee 5 @FUNCTION OF IC TERMINALS ...............000..0 0000s 32
@CONNECTIONS ......... 2 cece eee ne eeee 6~9 @REPLACEMENT PARTS LIST ..............0.000 eee 33~38
e@SETTING THE TIME OF DAY ......... 0.0 cece eee eee 9 e@CABINET PARTS LOCATION .............- 0.0. eee eee e eee 39
e@DISASSEMBLY INSTRUCTIONS .................04. 10~13 @PACKAGING .... 0. cece cece cence teen ne eeeneeatens 40
m@ BEFORE REPAIR
(1) Turn off the power supply. Using a 10Q, 10 W resistor, connect both ends of power supply capacitors (C701, C702) in order to discharge the
voltage.
(2) Before turning the power supply on, after completion of repair, slowly apply the primary voltage by using a power supply voltage controller to make
sure that the consumed current at 50/60 Hz in NO SIGNAL mode is mode should be shown below with respect to supply voltage 230 V/240 V.
Power supply voltage AC 230 V AC 240 V
Consumed current 50 Hz 130~230 mA 110~210mA
m@ PROTECTION CIRCUITRY
The protection circuitry may have operated if either of the following conditions is noticed:
“No sound is heard when the power is switched ON.
*Sound stops during a performance.
The functions of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are “shorted”, or if
speaker systems with an impedance less than the indicated rated impedance of this unit are used.
If this occurs, follow the procedure outlined below:
1. Switch OFF the power.
2. Determine the cause of the problem and correct it.
3. Switch ON the power once again.
Note:
When the protection circuitry functions, the unit will not operate unless the power is first switched OFF and then ON again.
| ACC ESSORI ES Check the packing carton for these accessories.
(RJA0019-2K) for (E), (EG), (GC) areas
(VJA0733) for (EB) area
(SJA173) for (GN) area
ie ieee Hong Mei See daca hee Ae ee 1 pe. eSurround speaker cords. ... 0.2.0... cece ee eee eee 2 PCS,
(RJL1P001B25) for (GC), (GN) areas
(RAK-SC709WH) Note: These are available on sale route.
Remote control transmitter... 2.2. eee eee 1 pe. Remote control batteries
UM-4, AAA, RO3 2... eee 2 pcs.
eFlat cable @Antenna:holder-2.: 2304-4 e a shateaies f4 Rs eee ea SES 1 pe.

Technics SA-CH750 Specifications

General

Brand	Technics
Model	SA-CH750
Category	Amplifier
Language	English